This incident has been resolved.
Jan 25, 15:16 EST
A fix has been implemented and we are monitoring the results.
Jan 25, 15:11 EST
We are experiencing an interruption in service preventing payments from being processed for some stores. Online store checkouts will remain in our queue and buyers will be notified once payments are complete. Checkouts from other sales channels, including Point of Sale (POS), may be unavailable during this time. We are investigating and will keep you updated.
Jan 25, 15:05 EST